davies



(Nom-foam.) T. H. DAVIES- Harrow. l No. 236,790. Patented Jan. 18,1881.

ATTURNEYS.

UNITED STATES PATENT OEEICE.

THOMAS H. DAVIES, OF FAIRVIEW, NEW YORK.

HARROW.

SPECIFICATION forming part of Letters Patent No. 236,790, dated January 18, 1881.

Application filed June 8, 1880.

To all whom @t may concern Be it known that I, THOMAS HUMPHREYS DAVIES, of Fairview, in the county of Gattaraugus and State of New York, have invented a new and useful Improvement in Harrows, of which the following is a specication.

Figure l is a plan view of the improvement. Fig. 2 is a section through the line :c x, Fig. 1. Fig. 3 is a section through the line y y, Fig.1. Fig. 4 is a section through the line z z, Fig. 1.

The object of this invention is to furnish harrows so constructed as to adjust themselves to uneven ground, which will allow the teeth to be readily detached and adj usted, and which shall be simple in construction, strong, and durable.

Similar letters of reference indicate corresponding parts.

The harrow may be made in one, two, or three sections, each section being formed of three or more longitudinal bars, A,connected by cross-bars B. The bars A are bent into zigzag form, and at their bends or angles are passed between jaws O, formed upon the under sides of the cross bars B, where they are secured in place by keys,pins, or bolts D,passed through holes in the said jaws C at the lower sides of the bars A, as shown in Fig. 3, the bends in the bars A preventing the bars A B from changing their relative positions.

E are keepers or bands,-through the cavities or slots of which the bars A are passed. Through one end of the bands E, and at right angles with the bars A, are formed rectan gular holes or slots to receive the teeth F. The teeth F are made square and slightly tapering, so that when the said teeth are driven into the holes in the bands E the cross-bars B and teeth F will be rmly clamped together. With this construction, by loosening the teeth F the bands or holders E can be adjusted in any (No model.)

desired position upon the bars A to bring the teeth into such positions that no two teeth will travel in the same track, and that the tracks of all the teeth may be equidistant.

Upon the ends of two or more of the bars B of each section are formed slotted cross-heads G, to receive long bolts or pins H, which are passed through holes or eyes in the ends of the small plates I. The other ends of the eyeplates I have holes formed through them to receive the bars A, the bends of the bars A keeping the said eye-plates from slipping out of place. By this construction the sections of the harrow are hinged to each other in such a manner that they can adjust themselves to an uneven surface of ground, that one section can work at a lower level than the others, and that the sections will have a longitudinal movement upon each other.

Upon the end ofthe middle bar, A, of each section is formed an eye, J, to receive the end of a short chain, K, or a clevis attached to the said chain. The outer ends of the chains K are attached to the draw-bar L, with the center of which the double-tree is connected.

Eyes J are formed upon both ends of the middle bars, A,of the harrow-sections, so that the harrow can be drawn either end forward.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- A harrow-frame consisting of the long bars A, bent at intervals to form alternating angles, and the cross-bars B, having the jaws G on the under side, the cross-bars being secured at the vertices of the angles of the long bars, as shown and described.

THOMAS HUMPHREYS DAVIES.

Witnesses:

EARL SEAMAN, REUBEN S. WIEDER. 

